Journal Article

FZJ-2019-02008

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tuning Methods for Semiconductor Spin Qubits

Botzem, T. (Corresponding author)FZJ* ; Shulman, M. D. ; Foletti, S. ; Harvey, S. P. ; Dial, O. E. ; Bethke, P. ; Cerfontaine, P. ; McNeil, R. P. G. ; Mahalu, D. ; Umansky, V. ; Ludwig, A. ; Wieck, A. ; Schuh, D. ; Bougeard, D. ; Yacoby, A. ; Bluhm, H. (Corresponding author)FZJ*

2018
American Physical Society College Park, Md. [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/21886  doi:10.1103/PhysRevApplied.10.054026

Abstract: We present efficient methods to reliably characterize and tune gate-defined semiconductor spin qubits. Our methods are developed for double quantum dots in GaAs heterostructures, but they can easily be adapted to other quantum-dot-based qubit systems. These tuning procedures include the characterization of the interdot tunnel coupling, the tunnel coupling to the surrounding leads, and the identification of various fast initialization points for the operation of the qubit. Since semiconductor-based spin qubits are compatible with standard semiconductor process technology and hence promise good prospects of scalability, the challenge of efficiently tuning the dot’s parameters will only grow in the near future, once the multiqubit stage is reached. With the anticipation of being used as the basis for future automated tuning protocols, all measurements presented here are fast-to-execute and easy-to-analyze characterization methods. They result in quantitative measures of the relevant qubit parameters within a couple of seconds and require almost no human interference.

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Contributing Institute(s):

1. JARA Institut Quanteninformation (PGI-11)
2. JARA-FIT (JARA-FIT)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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